Question

classify the following as Rational or Irrational -​

Answer 1

(3+√5)(3-√5)

=3²-(√5)² (a+b)(a-b)=a²-b²

=9-5

=4

the expression is rational

Answer 2

Step-by-step explanation:

(3+√5)(3-√5)=9-5=4=4/1. ( By (a+b)(a-b)=a^2- b^2)

As 4 can be written in the form of p/q where q is greater than 0 . Therefore given number is rational.